CN202391607U - Diesel engine exhaust gas recirculation system with cooling device - Google Patents
Diesel engine exhaust gas recirculation system with cooling device Download PDFInfo
- Publication number
- CN202391607U CN202391607U CN2011204955615U CN201120495561U CN202391607U CN 202391607 U CN202391607 U CN 202391607U CN 2011204955615 U CN2011204955615 U CN 2011204955615U CN 201120495561 U CN201120495561 U CN 201120495561U CN 202391607 U CN202391607 U CN 202391607U
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- valve
- valve body
- control motor
- diesel engine
- control
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- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Exhaust-Gas Circulating Devices (AREA)
Abstract
The utility model provides a diesel engine exhaust gas recirculation system with a cooling device. The diesel engine exhaust gas recirculation system comprises a control motor, an adjusting screw, a fastening nut, a first air nozzle, a valve body, a control valve and a second air nozzle. A spiral rotary circulation cooling runner is arranged inside the valve body above an air cavity; and the first air nozzle and the second air nozzle are respectively arranged at two end openings of the circulation cooling runner. The control valve is arranged in the air cavity of the valve body, the opening degree of a control valve gate is adjusted and a small part of exhaust gas generated by the diesel engine is sent back to an engine cylinder. The control motor is connected with the valve body through the adjusting screw and the fastening nut, the adjusting screw is arranged between the combination surfaces of the control motor and the valve body so as to separate the control motor from the valve body for a certain space, and therefore the high temperature exhaust gas is prevented from influencing the performance of the control motor.
Description
Technical field
The utility model relates to the diesel engine technologies field, particularly a kind of band cooling unit diesel engine exhaust recirculating system.
Background technique
Gas recirculation system is called for short EGR; Its role is to reduce the discharge capacity of the nitrogen oxides in the diesel engine exhaust; Make the recirculation volume of waste gas all reach optimum in each operation point; Thereby make combustion process be in optimal situation all the time, guarantee that finally the pollution composition in the effulent is minimum.Along with the increasingly stringent to diesel engine emissions control, the EGR technical application also more and more widely.The EGR control valve unit is used for controlling FT; It sends the sub-fraction of the waste gas that DENG produces back to cylinder again; EGR gas since have inertia will the retarded combustion process; That is to say that thereby velocity of combustion will slow down the pressure forming process that causes in the firing chamber and slow down, reduce the generation chance of oxynitrides.It is lower and to factors such as the oil product requirement are relatively low that the EGR motor has a cost, impels EGR to become the product that numerous dealers and user pay close attention to, and the noise of diesel engine will be related to the application problem of diesel engine in automobile market with discharging.After having adopted the EGR technology, for improving economic shape, the applicability of DENG, this system need take effective cooling means or device could guarantee that intrasystem each component effectively move.
The type of cooling at present both at home and abroad commonly used is EGR valve and control motor to be combined as a whole be arranged in the outlet end of cooler for recycled exhaust gas as total member; The high-temperature gas that gets into EGR is through cooler (or pipe etc.) cooling back entering EGR valve; Through ECU and Electric Machine Control exhaust gas flow, be commonly called as " cold junction EGR " by the EGR valve; The employing that has in addition is through other mechanical drive mode hot junction arranging EGR valves such as linkage mechanisms.
" cold junction EGR "; Its EGR valve and control motor etc. are arranged in the outlet end of cooler for recycled exhaust gas, and EGR valve leading portion pipeline (comprising cooler) is longer, makes to the speed of response of EGR gas control slower; And carbon distribution influences EGR emissions of diesel engines is controlled easily; Adopt the EGR that arranges through other mechanical drive mode hot junctions such as linkage mechanisms, high-temp waste gas is failed effectively cooling and its control motor performance is affected, and occur catching phenomenon easily, and sensitivity is relatively poor.
Summary of the invention
The purpose of the utility model is to overcome the deficiency of existing technology and a kind of band cooling unit diesel engine exhaust recirculating system is provided; Improve the dynamic response property of gas recirculation system through cooling, satisfy the diesel engine emissions requirement the gas recirculation system valve body.
The technological scheme of the utility model is: a kind of band cooling unit diesel engine exhaust recirculating system, it comprises control motor, adjustment screw, tightening nut, first valve, valve body, control valve and second valve.
Be provided with the rotating circulation coolant flow channel of spiral in the valve body above the valve body air cavity, first valve and second valve are installed in two ports of circulation coolant flow channel respectively.Control valve is installed in the air cavity of valve body, the aperture of adjustment control valve valve, and the sub-fraction of the waste gas that DENG is produced is sent cylinder again back to.The control motor is connected with valve body with tightening nut through the adjustment screw, and the adjustment screw is located between the junction plane of control motor and valve body, makes control motor and valve body separate certain space, prevents that high-temp waste gas from exerting an influence to the control motor properties.
During use; Band cooling unit diesel engine exhaust recirculating system adopts the hot junction to arrange; After directly being installed on gas exhaust manifold, the inlet end of valve body air cavity is connected with enmgine exhaust through pipeline, and the exhaust end of valve body air cavity is connected with engine air inlet tube through pipeline.First valve on the valve body is connected with cooler with second valve, and cooling medium is realized the cooling to valve body through the circulation coolant flow channel of body cavity, thereby realizes the high-temperature gas that gets in the valve body air cavity is cooled off.The control motor is sent cooled waste gas sub-fraction back to cylinder again through the aperture of valve control device adjustment control valve valve, and remaining waste gas is discharged from gas exhaust manifold.
The utility model compared with prior art has following characteristics:
1, the band cooling unit diesel engine exhaust recirculating system that provides of the utility model adopts the hot junction to arrange, directly be installed on gas exhaust manifold after, pipeline is short, has improved the speed of response of EGR gas control;
2, be provided with the circulation coolant flow channel in the valve body, valve body cooled off, improved sensitivity, be difficult for producing catching phenomenon through the cooling medium that gets into the circulation coolant flow channel;
3, control motor and valve body separate certain space, have avoided the influence of high-temp waste gas to the control motor performance effectively.
Further describe below in conjunction with accompanying drawing and embodiment detailed structure the utility model.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model;
Accompanying drawing 2 is the left view of accompanying drawing 1;
Accompanying drawing 3 is the A-A sectional view in the accompanying drawing 1.
Embodiment
A kind of band cooling unit diesel engine exhaust recirculating system, it comprises control motor 1, adjustment screw 2, tightening nut 3, first valve 4, valve body 5, control valve 6 and second valve 7.
Be provided with the rotating circulation coolant flow channel of spiral 5-1 in the valve body above valve body 5 air cavity 5-2, first valve 4 and second valve 7 are installed in two ports of circulation coolant flow channel 5-1 respectively.Control valve 6 is installed in the air cavity 5-2 of valve body 5, the aperture of adjustment control valve 6 valves, and the sub-fraction of the waste gas that DENG is produced is sent cylinder again back to.Control motor 1 is connected with valve body 5 with tightening nut 3 through adjustment screw 2, and adjustment screw 2 is located between the junction plane of control motor 1 and valve body 5, makes control motor 1 separate certain space with valve body 5, prevents that high-temp waste gas from exerting an influence to the performance of control motor 1.
Claims (1)
1. be with cooling unit diesel engine exhaust recirculating system for one kind, it is characterized in that: it comprises control motor, adjustment screw, tightening nut, first valve, valve body, control valve and second valve;
Be provided with the rotating circulation coolant flow channel of spiral in the valve body above the valve body air cavity, first valve and second valve are installed in two ports of circulation coolant flow channel respectively; Control valve is installed in the air cavity of valve body, the aperture of adjustment control valve valve, and the sub-fraction of the waste gas that DENG is produced is sent cylinder again back to; The control motor is connected with valve body with tightening nut through the adjustment screw, and the adjustment screw is located between the junction plane of control motor and valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204955615U CN202391607U (en) | 2011-12-02 | 2011-12-02 | Diesel engine exhaust gas recirculation system with cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204955615U CN202391607U (en) | 2011-12-02 | 2011-12-02 | Diesel engine exhaust gas recirculation system with cooling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202391607U true CN202391607U (en) | 2012-08-22 |
Family
ID=46666537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204955615U Expired - Fee Related CN202391607U (en) | 2011-12-02 | 2011-12-02 | Diesel engine exhaust gas recirculation system with cooling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202391607U (en) |
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2011
- 2011-12-02 CN CN2011204955615U patent/CN202391607U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120822 Termination date: 20181202 |